P started walking straight towards north. After taking how many right turns during her journey she will be finally facing towards north? (she took only right turns during her journey)
Show answer & explanation
Correct answer: A
Explanation
Initial Direction: North
Rule: The person (P) only takes right turns.
Each right turn results in a 90o Clockwise rotation:
Start: Facing North.
1st Right Turn: Facing East.
2nd Right Turn: Facing South.
3rd Right Turn: Facing West.
4th Right Turn: Facing North (back to the original direction).
Therefore, For P to be facing North again, she must complete a full circle (360o). Since each turn is 90o, it takes 4 turns to return to the starting direction.
Hence, the correct answer is 4.